`36`, D

- Dẫn chứng : To ensure a good night’s sleep, teens should establish a consistent sleep schedule, create a sleep-friendly environment, limit caffeine and electronic device use before bedtime, and engage in relaxation techniques.

`37`, B

- Dẫn chứng : Adequate sleep has been linked to improved cognitive function, memory, and concentration, which are virtual for academic performance.

`38`, B

- Dẫn chứng : Teens require around 8-10 hours of sleep per night, but many often fall short due to various factors like schoolwork, extracurricular activities, and electronic devices.

`39`, D

- Dẫn chứng : Teens require around 8-10 hours of sleep per night

`40`, A

- it = insufficient sleep (giấc ngủ không hợp lí) = lack of sleep (sự thiếu ngủ)